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March 6, 1962 Original Filed Oct.

R. E. BOYDEN ETAL CALCULATING MACHINE CLUTCH CONTROL MEANS 5' Pre51111101711 12 Sheets-Sheet 1 M Mk3 ATTORNEY.

March 6, 1962 R. E. BOYDEN ETAL 3,023,953

CALCULATING MACHINE CLUTCH CONTROL MEANS l2 Sheets-Sheet 2 OriginalFiled Oct. 25. 1956 March 6, 1962 R. E. BOYDEN ETAL CALCULATING MACHINECLUTCH CONTROL MEANS l2 Sheets-Sheet 3 Original Filed 00%.. 25, 1956 V41 E JV N m mm M d m T T Z Z T N ZJ H BU E NE uwm mmw 2 m anfl March 6,1962 R. E. BOYDEN ETAL 3,023,953

CALCULATING MACHINE CLUTCH CONTROL MEANS l2 Sheets-Sheet 4 OriginalFiled Oct. 25, 1956 INVENTORJ, Rebel? E. B0 z a en, 777117621 KJco $41]zza/awz heu &

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March 6, 1962 R. E. BOYDEN ETAL 3,023,953

CALCULATING MACHINE CLUTCH CONTROL MEANS Original Filed Oct. 25, 1956 12Sheets-Sheet 5 INVENTORJ, Robert EBQj/ mum M cozzafara & dlpflezu EJ"arm HTTORNEY.

March 6, 1962 R. E. BOYDEN ETAL 3,023,953

CALCULATING MACHINE CLUTCH CONTROL MEANS Original Filed Oct. 25, 1956 12Sheets-Sheet 6 INVENTORJ, Robert K13030 617, milTon YJcozzafm a bdlpheusE52 nsell HTTORNEY.

March 6, 1962 R. E. BOYDEN ETAL 3,023,953

CALCULATING MACHINE CLUTCH CONTROL MEANS l2 Sheets-Sheet 7 OriginalFiled Oct. 25, 1956 INVENTORJ, Raberi' E.B0 ya en BY mum \(Jcozzafava MUheus ymsei 2 A HTTORNEY.

March 6, 1962 R. E. BOYDEN ETAL 3,023,953

CALCULATING MACHINE CLUTCH CONTROL MEANS Original Filed Oct. 25, 1956 12Sheets-Sheet 8 INVENTORJ,

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* I i on cozza ava \"I-Q t BY &alpheus Efianseil HTTORNEZ March 6, 1962R. E. BOYDEN ETAL CALCULATING MACHINE CLUTCH CONTROL MEANS l2Sheets-Sheet 9 Original Filed Oct. 25, 1956 wx wan 3 3% 2 .IT QWULLI mnwm HE P Q RoberT E. miUon w March 6, 1962 R. E. BOYDEN ETAL CALCULATINGMACHINE CLUTCH CONTROL MEANS Original Filed Oct. 25, 1956 THE STOR ECITY STATE Send To MRS.JANE DOE 123 D.STREET /'1 CITY STHTE 7 A 6 YOURRECEIPT M Y THRNK YOU DEPT. ITEM AMOUNT with symBo1==SiaTe Tax )7 n CityTax 3 CusTomer's number 257 2 0 4 5 Clerks number 9 7 i 6 a Nosymbo1=Charge (Type of Transaction).

12 Sheets-Sheet 1 1 INVENTORJ, Rober'l' E. Boyden, milfim 3". Scozzafava&lllpheuy mf f' fi 2 a VHTTORNEY.

March 6, 1962 R. E. BOYDEN ETAL 3,023,953

CALCULATING MACHINE CLUTCH CONTROL MEANS Original Filed Oct. 25, 1956 12Sheets-Sheet 12 33 3 H3 Eh w 5.5 Q Q 8 m m u W E i 8% x Q 3% 3 3w 3a a:S: Q3 8 3 Q Q HTTORNEY.

United States Patent 3,023,953 CALCULATING MACHINE CLUTCH CONTROL MEANSRobert E. Boyden, San Gabriel, Milton V. Scozzafava, Arcadia, andAlpheus F. Stanseil, San Lorenzo, Calif, assignors to Clary Corporation,San Gabriel, Caiif, a corporation of California Original applicationGet. 25, 1956, Ser. No. 618,345, now Patent No. 2,894,449, dated Juiy14, I959. Divided and this application May 11, 1959, Ser. No. 817,619

9 Claims. (Cl. 235-62) This invention relates to business machines foraiding and recording sales transactions and has particular reference toa receipt printer therefor.

Heretofore, department stores and the like have generally utilized cashregisters for keeping a record of the amount of money involved in salestransactions. The clerk identification number, department number andother identification matter was also entered into the cash register andrecorded on a printed record. The sales person also generally recordedin more detail data pertaining to each sale, such as the class ofmerchandise, the number of items sold, department number, etc., in aseparate sales book or sales record.

A receipt was printed by the cash register and given to the customer.Later, the cash register and the sales book entries were forwarded to anaccounting department where the records were correlated and wereprocessed to compile statistics for inventory control, taxes, and thelike. Also, statements were prepared from the sales book entries in thecase of charge transactions.

The above procedure, although generally satisfactory, requiredconsiderable duplication of work in entering data in the cash registerand also in the sales book entries. Also. the correlation of the variousrecords and additional handling of the same by the accounting departmentfurther increased the amount of clerical work.

It, therefore, becomes a principal object of the present invention toprovide an improved apparatus for concomitantly providing a customersreceipt and a complete record of the sales transaction.

Another object is to reduce the duplication of work on the part of asales person and/or cashier in recording a sales transaction.

Another object is to reduce the amount of manual figurins. and book workin making a sales transaction.

Another object is to reduce the average time necessary for salespersonnel and customers in making sales transactions.

Another object is to reduce errors in accounting procedures incident tosales transactions.

The following specification and the accompanying drawings will revealthe manner in which the above and other obiects are accomplished.

FIG. 1 of the drawings is a plan view of a sales transacti n machineembodying the present invention.

FIG. 2 is a longitudinal sectional view through the keyboard printer andassociated parts of the machine and is taken along the line 2-2 of FIG.1.

FIG. 3 is a longitudinal sectional view taken generally along the line33 of FIG. 1 illustrating the receipt printer unit together with some ofits controls in initial position.

FIG. 4 is a view similar to FIG. 3 illustrating the printer and itscontrols in a second or advancing position.

FIG. 5 is a View similar to FIG. 3 with the printer and its controlsnear the end of its printing stroke.

FIG. 6 i a sectional elevation of a paper feed mechanism in its initialposition and is taken along the line 66 of FIG. 1.

FIG. 7 is a view similar to FIG. 6 showing the paper 3,623,953 PatentedMar. 6, 1962 ice feed in its advanced position part way through themachine cycle.

FIG. 8 is a transverse sectional view taken along the line 8-8 of FIG.6.

FIG. 9 is a longitudinal sectional elevation of the main symbol rack andits control bars.

FIG. 10 is a sectional elevation of the clutch and its controls.

FiG. 11 is a sectional view of the auxiliary symbol rack and its drivingconnection to the program drum.

FIG. 12 is a plan view of the program drum and is taken along line 1212of FIG. 11.

FIG. 13 is a sectional view of the program drum driving ratchet and istaken along line 1313 of FIG. 12.

FIG. 14 is a sectional elevation of a portion of the drum drivingmechanism and is taken along line 1414 of FIG. 12.

FIG. 15 is a developed view of the three printed facets of the programdrum illustrating the inscriptions therein.

FIG. 16 is a plan view of the receipt printer unit as seen from line1616 of FIG. 3.

FIG. 17 is a sectional plan view of the customers token ejector,illustrating the same in its initial position.

FIG. 18 is a view similar to FIG. 17 illustrating the ejector in itsinner position.

FIG. 19 is a sectional view of certain parts associated with the voidbar.

FIG. 20 is a facsimile of a completed receipt.

FIG. 21 is a wiring diagram of the motor circuit.

FIG. 22 is a timing chart.

This sales transaction machine embodies certain mechanism which isbasically similar to that found in the well known Clary adding machineand reference is hereby made to the R. E. Boyden Patent No. 2,583,810issued on June 7, 1949, for details of the basic Clary adding machine.Therefore, only those portions of such mechanism which relate to, orform a part of, the present machine will be described in detail herein.This application is a division of Patent Application Serial No. 618,345,filed October 25, 1956, for Sales Transaction Machine and since maturedinto Patent No. 2,894,449 issued on July 14, 1959.

The machine is of the full keyboard type and comprises four rows ofdenominationally arranged differential actuator racks 12 (FIG. 2), eachcontrolled by a row of nine amount keys 13 and located at the right handside of the machine.

A plurality of like racks (not shown) located at the left hand side ofthe machine are controlled by keys 15a similar to the amount keys butintended only to control entry into an identification printer section.For this purpose, the keyboard is arranged in two sections. The righthand section 14, including the four rows of amount keys 13, is providedto enter the amount of items included in a sales transaction and rangeprogressively in digital value from 1 to 9. The left hand section 15 ofthe keyboard is provided to enter various identification data pertainingto sales transactions, as indicated on the sample receipt illustrated inFIG. 20. The right hand row 16 of the keyboard section 15 carry numeralsranging from 1 to 9 which may be used as a code representing the type oftransaction, i.e. 9 for charge, 3 for C.O.D., 1 for cash, etc, whenentered by depressing an add bar 35. When entered by a tax bar 38, thesenumerals may be a code for Federal, State, etc., tax. When entered by aminus bar 39, these same numerals may be a code for refund, discount,etc.

The left and right hand sections of the keyboard are divided by a fixedstrip 17.

Describing first the general operation of the machine, it is assumedthat the machine has been cleared beforehand by depression of anendof-transaction bar 23 which has also released a normally depressedstart key or bar 18 (designated ST in FIG. 1 and described later). Allof the control bars of the machine are normally locked to preventunauthorized persons from operating the same. Therefore, the start bar18 must be first pressed to unlock the control bars. It is also assumedthat the paper receipt tape P (FIG. 20) has already been threaded into aposi tion above a receipt printer table designated generally at 19 (FIG.3).

If the transaction is to be of the charge type, a customers charge token20 (FIG. 1) will be placed in a slide 21 and the latter will be manuallypushed to the left so as to align the token 20 with a sintered preinkedprinting roller 22 carried by means to be described hereinafter. Thetoken 20 may be of any suitable well known construction having thecustomers name, address, etc., embossed thereon with upstandingcharacters, thereby identifying the customer by an imprint upon thereceipt. Such a token is disclosed. for example, in the patent toDugdale, No. 1,801,593 issued on April 21, 1931.

The clerk now enters the store department number in any of the firstthree rows of keys at the left in section 15, the catalog number of thefirst item purchased in the next two rows in section 15, and then theamount in the section 13. Assuming that the start bar it; has beendepressed to unlock the control bars of the machine, the add key is nowdepressed thereby entering the amount into the accumulator and causingthe roller 22 to roll upwardly from the position of FIG. 4 to that ofFIG. thereby impressing the form carried by the table 19 upon the uppersurface of the tape P, as illustrated generally at 25b in FIG. 20, andprinting the numerical data upon the tape P as indicated by the firsthorizontally printed line 251 of such data. The paper is now advancedone space and the keyboard is cleared for the next entry. The roller 22is latched in its upper position illustrated in FIG. 5, clear of thetape P, while the subsequent entries are made and remains in suchposition until the end-of-transaction bar 23 is depressed.

One or more additional item entries may be made, including item catalognumber and amount, and upon depression of the add bar after each itementry, these are printed as indicated at 252 (FIG. 20) and the tape P isagain advanced one space by mechanism not shown. Following this, asubtotal is obtained as indicated at 253 to form a basis of computingthe tax or taxes. Such tax is then entered in the keyboard and tax bar38 depressed, the tax being printed as at 254 and 255. The total is thenobtained by depressing total bar 36 and the total is printed as at 256.

Additional identification data such as the customers number, clerksnumber, etc., is entered in the left hand keyboard section and the addbar depressed to print the same as indicated at 2.57. Thereafter, theend-oftransaction bar 23 is depressed causing a cycle to clear themachine preparatory to a new transaction and to lock the control barsagainst redepression.

During the last described cycle, the form printing roller 22 is moveddownwardly to its initial position shown in FIG. 3. However, during thisdownward passage of the roller it is held out of contact with the tape Pso that a print is not made upon the latter. scribed cycle, the tape Pis also advanced approximately the length of the table 19. The tape maynow be severed by drawing the same against the tear-off bar.

The tape is provided in duplicate (as shown in FIG. by the use of acarbon transfer coating 161 on the back of the original tape so that theoriginal may be given to the customer as a receipt while the carbon copyis filed for bookkeeping purposes.

In the event an erroneous entry has been entered in the machine or thesale uncompleted, a void key 1% is depressed thereby causing a machinecycle and permitting the roller 22 to move from its upper position ofFIG. 5 to its void print position shown by the dot and During the lastde-' dash line position 220 and located approximately midway between itsextremes of movement. During this movement the roller is held out ofprinting contact With the tape. The roller is then rolled upwardlyduring this cycle while in printing contact to its position shown inFIG. 5, thereby overprinting the upper portion of the form on theformally and previously printed data to indicate that the salestransaction has been voided.

The keyboard comprises a plurality of keys like 13 (FIG. 2), each havinga key stern guided for Vertical movement in aligned slots formed inplates 26 and 27, the latter plates forming part of keyboard frame supported by the machine frame. The lower edges of the key stems cooperateWith spaced shoulders 28 formed on the aligned racks 12 to limit theforward advancement of each rack to a number of increments correspondingto the value of the key depressed in the associated row.

Spring means (not shown) are provided for normally holding the variouskeys in their illustrated raised positions, and means are furtherprovided for latching any key in rack arresting position upon depressionthereof. For this purpose, each key has a cam lobe 2) engageable with alocking bail 36, each row of keys having such a bail. Each bail ispivoted at its opposite ends to front and rear upstanding walls 31 ofthe bottom plate 2'7. As a key is depressed, it will rock its associatedbail outwardly, and as a lobe 29 passes the hail, the latter will beretracted partially by a suitable spring (not shown) to a positionwherein it latches the key in a rack arresting position.

A Zero block 3?. depends from each lock bail 3t! and, when no key in abank associated with a particular rack is depressed, the bail willlocate the zero block in a position directly in front of one of theshoulders 28 of the rack, thereby preventing substantial forwardmovement of the rack during a subsequent cycle of the machine. However,when any amount key is depressed and latched down, its associated bail29 will be held outwardly sufficiently to maintain its zero block out ofthe path of the aligned rack.

The machine is driven by a motor (not shown) through a cyclic clutch 33(FIG. 10) having its driven side connected to a rotatable shaft 34-. Theclutch is effective to cause a complete rotation of the shaft duringeach cycle of operation.

The machine is controlled to perform different operations by depressingvarious control bars, i.e. add bar 35, total bar 36, subtotal bar 37,tax bar 323, subtract bar 39, a repeat key 4t), void key 104, the startkey 18 and the end-of-transaction bar 23. The add bar 35 is suitablyconnected, by means not shown herein but disclosed in the aforementionedBoyden patent, to a rock shaft 41 (FIG. 10) having an arm 42 clampedthereon and engageable with a pin 43 fixed on a clutch control bar 44.The add bar 35 is thereby effective through rocking of the shaft 41 toadvance the clutch control bar 44 to the left to effect engagement ofthe clutch 33.

The clutch control bar 44 is connected through a book 45 to a latch 46through a pin 47. The latch 46 is part of a spring powered releasedevice for causing engagement of the clutch 33. The latch 46 is pivotedupon a frame pin 48 and engages a roller 49 carried on a slide 50supported for endwise movement by the frame pin 48 and another frame pin51. When the latch is partially rotated clockwise it will disengage theroller 49 thereby permitting the slide 51') to be driven to the left bya spring 52. As the slide 59 moves to the left, a lug 53 thereon strikesa pin 54 carried by a clutch control dog 55 thereby rocking the lattercounterclockwise about a pivot support 260 to enable engagement of theclutch 33.

When the slide 50 is driven to the left, .a notch 56 formed in the slidemoves adjacent a pin 57 carried on a cam follower 58. The latter ispivotally supported on the shaft 74 and is urged counterclockwiseagainst a cam 59 by a spring (not shown). Part way in the machine cycle,the cam 59 becomes effective to move the slide 50, through the follower58, back to its latched position thereby permitting the dog 55 to bereturned clockwise by the spring 69 to its normal clutch disengagingposition shown in FIG. 10. The latch 46 is returned by a spring 60 andthe clutch control bar 44 by a spring 61.

Pins 62, 63, 64 and 65 (FIGS. 9 and 10) underlying the stems of thecontrol bars 36, 37, 38 and 39, respectively, are fixed to individualcranks all pivoted upon frame pins, like pin 264, (FIGS. 9 and 10) andurged into their upper illustrated positions by individual springs, likespring 265. It will be observed that when the clutch control bar 44 ismoved to the left by depression of one of the aforesaid pins by acontrol bar, ledges 66 thereon will prevent the depression of any othercontrol bar. Likewise, when the bar 44 is moved to the left a shoulder67 of the latch 46 will be blocked beneath the roller 49 therebypreventing the return of the bar 44 to the right except as hereinafterdescribed.

The clutch dog 55 is also effective, when rocked counterclockwise toengage the clutch, to rock a switch control lever 68 against the actionof a spring 69 thereby closing a switch 70 in the machine motor circuit.

Means (not shown) are provided for advancing the racks 12 toward theleft during the first part of a machine cycle and for returning them totheir illustrated home positions during the latter part of the cycle.The racks are provided with slots 71 and 72 which are slideably guidedover rack support shafts 73 and 74, respectively. The shaft 73 isslideably mounted in guide slots 75 (FIGS. 9 and 11) formed in themachine side frames 76, While the ends of the shaft 74 are fixed in theside frames.

In order to yieldably advance the various racks, each rack has opposednotches 77 located at the closed end of its slot 71, the notches beingnormally engaged by rollers 78 carried by pawls 79 pivotally mounted onthe shaft 73. A spring 80 urges each pair of pawls in oppositedirections thereby holding the rollers 7 8 in driving engagement withthe notches 77. However, during advancement of the shaft 73, when any ofthe racks 12 are blocked by a Zero block 32 or a depressed key stem 25,the rollers 78 will ride out of the notches 77 of the blocked rack andalong the edges of its slot 71.

The racks 12 are each operatively entrained with a respective one of aseries of numeral printing wheels 81 of a data printer generallyindicated at 32 in FIG. 2. Each printer wheel except a special symbolprinter wheel has a series of type characters spaced therearound andadvancing in value from 0 to 9.

The special symbol printer wheel (not shown) entrained with a symbolrack 83 (FIG. 9) is provided with a series of type therearoundcorresponding to the respective control bars and indicative of the typeof operation performed by the machine.

Each printer wheel is rotatably mounted on an individual arm 84 looselykeyed on a printer control shaft 85 and spring urged clockwise by atension spring 86, A gear 87, integral with each printer wheel, ismaintained in continuous mesh with a gear 88 also carried by therespective arm 84.

Except during printing operations, the arms 84 are held in theirrespective illustrated positions by the shaft 85 wherein the gears 83mesh with associated idler gears 89 rotatably journaled on a fixed shaft90. The latter idler gears mesh continuously with offset rack sections91 integrally mounted on the various racks 12.

During a mid-portion of a cycle, and after various racks 12 have beenadvanced to different positions limited by the key stems 25, the shaft85 is rocked clockwise, allowing the springs 36 to likewise rock thearms 84, if otherwise allowed to do so, causing the printer wheels 81 tomove into printing contact with a printing ribbon 92 and the paper tapeP as the latter passes around a platen 93.

An accumulator 94 is provided comprising a series of gears 95 rotatablyjournaled on a shaft 96 and associated with the racks 12 controlled bythe right hand section 14 only of the keyboard. Normally, the gears arelocated out of mesh with upper and lower rack sections 97 and 98 formedon the various racks, as shown in FIG. 2. During additive entryoperations of the machine, the accumulator is raised to mesh the gears95 with the rack sections 97 prior to the forward advancement of theracks and is returned to its illustrated neutral position to demesh thegears at the mid-portion of the cycle after the racks have been fullyadvanced and before they are returned. During subtractive entries andtotaling operations, the gears 95 are lowered into mesh with thesections 98 prior to advancement of the racks and are thereafterreturned to neutral before the return of the racks from advancedpositions.

The symbol rack 83 (FIG. 9) is supported in a manner somewhat similar tothat of the aforementioned racks 12, being guided over shaft 74 and aframe pin 275 and is yieldably connected to the drive shaft 73. For thispurpose, a detent pawl 99 is pivoted to the rack at 100 and is urgedupwardly by a spring 101 to normally maintain a detent notch therein inembracement with the drive shaft 73. Thus, the symbol rack is advancedby the shaft 73 until one of its stop shoulders, like 102, engages apin, like 65, which has been depressed by a control bar stem to alowered position, like 65a. At this time, the detent pawl 99 will yield,thereby positioning the rack to set the aforementioned symbol printerwheel (similar to wheel 81) in position to print a symbol indicative ofthe type of operation performed by the machine. Thus, lowering of thepins 62, 63, 64 and 65 performs two functions, first, the advancement ofthe clutch control bar 44 and, second, the differential blocking of thesymbol racks.

However, the pin 62 associated with the total bar 36 is not efiectiveupon depression of the total bar to stop the symbol rack at totalposition although the pin itself is lowered to move the clutch controlbar 44. The stoppage of the symbol rack at total position when the totalbar 36 is depressed is effected by a toe 103 formed on the stern of thetotal bar which, when the total key is depressed, is lowered into thebroken line position 103a wherein it can block an aligned shoulder onthe symbol rack.

However, the pin 62 is effective to stop the symbol rack at a moreadvanced position beyond the total position whenever either theend-of-tranaction bar 23 or the void key 104 is depressed. For thispurpose, a bail 105 (FIGS. 9 and 19) is pivoted at each end of the sideframes 76 of the machine. Integral with the bail 105 at the left side ofthe machine is a hook shaped camming lever 106 overlying the pin 62.Also, integral with the bail 105 at the right side of the machine is atoe 107 (FIG. 19) which underlies a pin 108 carried by a crank arm 109pivoted on a frame pin 110. The stem of the void key 104 overlies thepin 108 so that when the void key is depressed (as seen in FIG. 19) thebail will transfer movement to the pin 62 thereby lowering it to itslowered position 62a. Accordingly, the symbol rack will be arrested atthe most advanced or end-of-transaction position. The latter position ofthe symbol rack is also obtained when an extension 111 (FIG. 10) on thestem of the bar 23 depresses the pin 62 to its lowermost position. Ineither case the stern of the total bar 36 is prevented from falling by adetent spring 112 fixed to the keyboard top plate 26 and frictionallyengaging a notch in the edge of the stem.

Describing now the construction of a program indicating mechanismgenerally indicated at 113 (FIGS. 11 to 15, inclusive), the lattercomprises a drum 121 on which are printed instructions for the machineoperator to follow. Located at the right hand side of the machine is arack 114, driven by shaft 73 in the same manner as the amount racks 12,and entrained through intermeshed gears 115 and 116, shafts 117 and 18,and intermeshed gears 119 and 120 (FIG. 9) with the symbol rack 83located on the left hand side of the machine. The purpose of the geartrain is to arrest the rack 114 with the symbol rack 83 when the latteris stopped by the control bars.

The drum 121 is hexagonal in cross section and is keyed to a shaft 122journaled at its ends in brackets 123 and 124 riveted to the machineside frames and located at the forward end of the machine so as to beread through an opening 125 (FIG. 2) provided in the top of the machinecase 126. The drum 121 carries instructions on alternate ones of thesides thereof as indicated at a, b, and (FIGS. 11, 13 and Also keyed onthe shaft 122 is a three toothed ratchet wheel 127 and a disc 128 havingthree indentations 129 whereby the disc may be prevented from accidentalturning by a detent 130 pivoted at 131 upon a side frame and urgedagainst the edge of the disc by a spring 288. Freely journaled upon theshaft 122 is a Geneva like gear 132 having a body extension 133 at oneside thereof upon which is pivoted at 134 a pawl 135 urged by a spring136 into engagement with the ratchet 127. A curved segmental rack 137having two mutilated gear sections 138 and 139 located in side by siderelation is pivoted on a frame pin 149, and has a driven connectionthrough a link 141 to the rack 114. The gear 132 is also integrallyformed with two sets of gear teeth, one set having two teeth, 142 and143, and the other set having four teeth, 144, 145, 146 and 147. Thetooth 145 is located behind and formed integral with the tooth 143 so asto mesh between the two teeth 148 and 149 of the gear section 138. Thegear 132 is retained on the shaft 122 by a clip 132a.

In the cycle initiated by depression of the tubtotal key 37, the racks83 and 114 move together three increments before being stopped by thelowered pin 63. In a totaling cycle, a four increment movement of thelatter racks occurs before being stopped by the toe 103. In anend-o-f-transaction cycle, a seven increment movement of the racksoccurs before the racks are stopped by the pin 62.

The rack 137 and the gear 132 are so formed and timed that threeincrements of symbol rack movement will move the pawl 135 clockwise froma position overlapping one tooth of the ratchet 127 to a positionoverlapping the next tooth of the ratchet, i.e. from 150 to 151 of FIG.13, the gear 132 rotating from the full line position toward the brokenline position of FIG. 14. When the symbol rack 83 and the rack 114return to their positions FIGS. 9 and 11, the rack 137 will return thegear 132 to the full line position of FIG. 14, thereby causing the pawl135 to pull the drum 121 around one-third of a revolution, i.e. the drumsurface b (see also FIG. 15) will move up to the reading positionformally occupied by the surface a in FIG. 13. When the stated four andseven increment rack movements occur in response to depression of thebars 36 and 23, respectively, the teeth 143 and 142 slide along thesmooth portion of the section 139. Therefore, only one tooth of theratchet 127 is overlapped by pawl 135 so that the drum 121 is neverpulled more than one-third of a revolution.

The symbol rack movement induced by the depression of the bars 39 and 38are only one and two increments, respectively. Therefore, the pawl 135does not move a full third of a revolution and the next tooth of theratchet 127 is not overlapped. Consequently, the pawl slides back to itsformer position without moving the drum.

As stated hereinbefore, certain indicia is printed on each receipt,above the first line 251 (FIG. of nu merical data printing. Theconstruction and movement of the means for printing such indicia isillustrated in FIGS. 3, 4 and 5 and will now be described. The printingtable 19 is secured at its edges, as by bend down tabs 152 and rivets153, to side frame plates 154 secured as by rivets 155 to the sideplates 76 (FIG. 9) of the machine. Plates 156 and 157 having typeindicia embossed thereon are secured to the table 19 as by screws 158(FIG. 16).

Loose tokens similar to the token 20 may be provided for insertion inthe slide 21 which tokens have embossed thereon type charactersindicating the type of transactions, such as Cash. In the case of acharge type transaction, a customers token indicating the customersname, address, etc., may be inserted in the slide to effect an imprinton the receipt as indicated at 20a (FIG. 20).

Duplicate paper tape P is fed from a supply roll 159, around and infrictional engagement with the platen 93 so as to overlie the embossedtype indicia carried by the plates 156, 157 and the particular tokenmounted in the slide 21. The paper tear-off bar 24 is pivotally mountedat 162 to the side plates 154 and is urged by a spring 163 toward anupper position shown in FIG. 3 to permit the tape P to be easilythreaded thereunder. A series of settable dater wheels 164 are freelyjournaled on a shaft 165 fixed in the side plates 154 and are positionedso that their type indicia are located on the same plane as the othertype indicia.

The dater wheels are detented in their set positions by gear wheels 166secured thereto and engaged by spring urged pawls 167.

The impression roller 22, formed of a porous material impregnated with afiuid ink, is provided to transfer a facsimile of the various typeindicia upon the tape P. The roller is fixed upon a shaft 168 freelyjournaled in the toes of a pair of inverted L-shaped arms 169. The otherends of the latter arms are freely journaled on the cyliudrically formedends of a cam shaft 170 which is rotatably journaled near each end inslots 172 formed in brackets carried by a portion of a machine frameplate 173. The slots 172 are fiat at their bottom edges and the shaft170 is flatened in cross section at one side, near each end, asindicated at 174. The shaft 171) is continuously pulled downwardly by aspring 175. Observe that when the arcuate portion of the shaft 170 restson the bottom fiat surface of the slots 172 the arms 169 and the roller22 is pushed upwardly a slight amount so that the roller does not forcethe tape P against the indicia plate 157 (FIG. 3).

In FIG. 4, the shaft 170 has been partially rotated until the flatsurface 174 of the shaft lies slightly above the bottom fiat edges ofthe slots 172 thereby permitting the arms 169 and likewise the roller 22to be pulled downwardly by the spring 175, thus normally pressing thetape P against the type characters on indicia plate 157.

Means for rocking the shaft 170 and thereby lowering or raising theroller 22 is provided, comprising a crank 176 fixed to the shaft 170, alink 177 pivotally connected at one end at 178 to the crank and at theother end at 179 to a swinging cam follower arm 180 which is pivoted onthe shaft 74. The arm 180 carries a roller 181 engageable by a cam 182keyed to the shaft 34.

Means are provided for moving the roller 22 over the tape P toward therear of the machine (to the right in FIG. 3), after it has been loweredinto intimate engagement with the tape P. For this purpose a pair oflinks 183 and 184 are respectively connected at one end, as at 185, 186(see also FIG. 6), to a pair of rocker arms 187 and 188. The latter armsare each pivoted on the shaft 74. A pair of identical cams 189 and 190(FIGS. 3 and 6) engage, respectively, rollers 191 and 192 carried on therespective arms 187 and 188. The other ends of the links 183 and 184 areeach respectively pivoted as at 193 to one of the arms 169. Each of thearms 187 and 188 carries a roller 194 engageable each with one of a pairof latch arms 195 and 196. The latter latches are pivotally supported ona machine cross rod 9 197 and are each provided with a toe 198underlying the bail 105. A pair of triggers 199 and 200 are fixed to theaforementioned shaft 118 adjacent the latches 195 and 196, respectively.

The upper edges 265 of the frame plates 154 are formed concentric withthe center of the shaft 170 when the later is in its rocked positionshown in FIG. 4. The edges 265 are located directly below the outer endsof the roller shaft 168 and are each of such radius that the shaft willride thereon when the roller 22 passes over areas of the printing plates156 and 157 having no type characters thereon. The edges will alsoprevent the roller 22 from impressing the tape P against the surface ofthe slide 21 when no token is inserted thereon. However, in order toprevent the roller from impressing the tape P against the side lips 266of the slide 21, raised cam lobes 267 are formed on the edges 220opposite such lips. Thus, the roller 22 will be raised sufficiently topass over these lips.

It will be noted that although the table is generally arcuate, the typecharacters on the plates 156 and 157 and the token 20 are located infiat planes. Thus, as the roller 22 moves thereover, the spring 175 willyield slightly, enabling intimate printing contact over all typecharacters.

To operate the machine, the token slide 21 must first be pushed towardthe left in FIGS. 1, 16, 17 and 18. A pin 201 fixed on the slidecooperates with a slot 202 formed in a toggle arm 203 pivoted to theunderside of the printer table 19 at 204 (FIG. 17). The toggle arm 203is urged into either one of two positions by a spring 205 fixed at oneend to the arm by a pin 206 and at the other end by a frame pin 207. Thefree end of the toggle arm is bent into a lug adaptable to swing intoengagement with a switch pin 209 when the slide 21 is pushed in, therebyclosing a circuit in the machine motor line whereby the machine may beoperated.

The clerk now depresses the start key 18 to unlock the control bars andthen enters the amount and identification number of the first item andthe department number into the keyboard and presses the add bar 35thereby engaging the clutch 33 through the bar 44 and also energizingthe motor through the switch 70.

The cam 182 will now turn counterclockwise from its position in FIG. 3to its position in FIG. 4 whereby the roller 181 will be permitted toroll down to the low portion of the cam and the pull of the spring 175will urge the fiat side 174 of the shaft 175 downwardly onto the fiatbottom edge of the slot 172 thereby pulling the roller 22 downwardly topress the tape P against the type indicia on plate 157.

Immediately thereafter, the cams 189 and 190, will, through the rollers191 and 192, cause the rocker arms 187 and 188 to turn clockwise aboutthe shaft 74 thereby moving the roller 22 over the tape P from theposition of FIG. 4 to the position of FIG. 5 during approximately 180 ofthe machine cycle. As the roller reaches its rearmost position, it ridesover the tear-oft" blade 24, causing the later to rock counterclockwiseslightly about its pivots 162. Shortly thereafter, the cam 182 willagain raise the roller 181 so that the shaft 170 is rocked from its flatto its arcuate surface, raising the roller from printing contact, asillustrated in FIG. 5. When the parts have reached this position, thelatches 195, urged by springs 210, move down behind the rollers 194thereby blocking the return of the roller 22 toward the left during therest of the cycle.

Also, at the same time that the rocker arm 188 is helping to move theroller 22 toward the right, i.e. during the first half of the cycle, iteffects blocking of a paper feed mechanism shown in FIGS. 6 and 7. Atriple pronged rocker arm 211 is pivoted on the shaft 74 adjacent thearm 188. One prong carries a roller 212 engaged by a cam 213 keyed uponthe shaft 34. Another prong carries a pin 214 located in the path of therocker arm 188. The third prong is pivoted at 215 to a link 216, in turnpivoted at its other end by a pin 217 to the body 21811 of an internalgear segment 218 pivoted upon a frame cross rod 219. The gear 218 is inmesh with a pinion 220 connected to the shaft 221 of the platen 93 by acoiled spring clutch 222 (see also FIG. 8). Also, fixed to the shaft 221is a hand wheel 223 which extends through an opening formed in themachine cover 126. The gear 218 is urged counterclockwise by a spring224.

During the cycle initiated by the first entry by the clerk as just abovedescribed, the rocker arm 188, having moved clockwise and having beenlatched in that position, prevents the rocker arm 211 from turningcounterclockwise by the engagement with the pin 214 thereby preventingthe counterclockwise movement of the gear 218 even though the low placeon the cam 213 has moved adjacent the roller 212. This blockingcondition continues through all subsequential entries by the clerkbecause the latches 196 remain behind the rollers 194 until either thevoid key 104 or the end-of-transaction bar 23 is depressed.

When the void key is depressed as illustrated in FIG. 19, the bail 105will be rocked thereby and will engage the toes 198, rocking the latches196 counterclockwise only enough to permit the rollers 194 to fall backuntil they engage shoulders 225 provided on the latches, thereby alsopermitting the roller 22 to drop back halfway over the indicia to itsdot-dash line position 22a, after which the roller 22 will again belowered into contact with the tape P and then rolled thereover and tothe right in FIG. 3 to overprint and void the unwanted receipt.

When all proper entries have been made, the clerk depresses theend-of-transaction bar 23 which will initiate another machine cycle.During this cycle, the symbol rack will move seven increments as notedhereinbefore, causing the triggers 200 (FIGS. 3 and 7) to rotatecounterclockwise sufficiently to pick up the latches, raising them intotheir dot-dash line positions of FIG. 7.

This will enable springs 240 to actuate arms 169 counterclockwise toreturn roller 22 to its initial forward position shown in FIG. 3. As thearm 188 recedes from engagement with the pin 214, the spring 224 willnow be come effective to rock the segment 218 counterclockwise causingthe cam follower 211 to follow the cam 213 down to its low point. Thecoil spring clutch 222 will slip during the last described movement butas the cam follower is subsequently rocked clockwise by the cam 213 thespring clutch 222 will take hold of or grip the platen shaft 221 to turnthe platen clockwise and thus advance the printed receipt rearwardlyunder the tear-off bar so that it may be torn off.

Also, when the end-of-transaction bar 23 is depressed and the symbolrack 83 moves out its fullest extent until it is stopped by thedepressed pin 62, a cam plate 226 riveted to the rack, engages a pin 227(FIG. 10) carried by the hook 45, thereby lifting the hook anddisengaging it from the pin 47. The movement of the rack 114 (FIG. 11)coincides with the symbol rack movement and during theend-of-transaction cycle, a pin 228 carried by the rack 114 engages theleft hand end of a slot 229 in a bar 230 slideably attached to the rack114 by a pin 231. When the bar 230 is thus carried fully to the left, apin 232 fixed on the stem of the start key 18 will snap up behind thebar 230 under the action of a spring 233, thereby locking the bar in itsleft hand position. In the latter position, the bar 230 in thrustagainst a lever 234 clamped to the shaft 41 and thereby, through thelever 42, holds the clutch control bar 44 in its left most positionwherein the shoulders 66 thereon underlie the various pins 62, 63, 64and 65 to block all the control bars from being depressed. However, theclutch dog 55 is permitted to fall back to enable disengagement of theclutch and opening of the switch 70 when the machine has com- 1 1 pletedits cycle because the hook 45 has been uncoupled from the pin 47.

The symbol racks 83 and 114 are also permitted to return to their righthand initial positions because of the slot 229, thereby causing the pawl135 to turn the program drum 121 one-third of a revolution to its startposition wherein the surface a is located uppermost in reading position.The machine will now remain locked until the start key H5 is againdepressed which will permit the bar 230 to snap back to the right,overlying the pin 232, when urged by a spring 235. When the start key isdepressed, it will also close a switch 236 which may be included insuitable control circuits such as a tape punch or a signal light at theclerks position. Since the cam plate 225 is removed from engagement withthe pin 227 during the latter half of each cycle, and the clutch controlbar 44 is permitted to return to its right hand position upon depressionof the start key, the book 45 will again return to a position where itwill be coupled to the latch 46.

Returning to further description of FIGS. 17 and 18, one of the printingroller supporting arms 169 is provided with a camming lug 237 whichwill, as the arm is moved rearwardly, brush aside a by-pass pawl 238pivoted at 286 on the toggle arm 293. The pawl will thus rock clockwiseagainst the action of a spring 239 and will thereafter snap back intoits normal position shown by the broken lines in FIG. 18. When the endof-transaction bar 23 is depressed, the arm 169 will be advanced asdescribed heretofore causing lug 237 to again engage the pawl and rotateit counterclockwise along with toggle arm 2% so as to move the slide 21outward to token ejecting position and also disengaging the switch pin209.

At the end of a transaction, the roller 22 is pulled back to theposition of FIG. 3 by a pair of springs 240 connected between the arms169 and the frame cross rod 219.

Having thus described the invention, what we desire to secure by UnitedStates Letters Patent is:

1. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentially controlling saidactuators, operating mechanism for said differential actuators includinga cyclically operable clutch, depressible control bars, and controlmechanism controlled by said bars upon depression of any thereof forcausing engagement of said clutch; means controlled by said operatingmechanism in response to depression of one of said bars for disablingsaid control mechanism during an operating cycle, a start key, and meansresponsive to actuation of said start key for re-enabling said controlmechanism.

2. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentially controlling saiddifferential actuators, operating mechanism for said differentialactuators including a cyclically operable clutch, a plurality ofdepressible control bars, and control mechanism controlled by said barsupon depression of any thereof causing engagement of said clutch; meansresponsive to depression of one of said bars for disabling said controlmechanism during an operating cycle, a latching device for latching saidcontrol mechanism in disabled condition, a start key, and meansresponsive to actuation of said start key for releasing said latchingdevice.

3. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentially controlling saidactuators, operating mechanism for said actuators including a cyclicallyoperable clutch, depressible control bars, and control mechanismcontrolled by said bars upon depression of any thereof for causingengagement of said clutch; a symbol printing device differentiallycontrolled by said bars upon depression thereof, means controlled bysaid symbol printing device in a certain condition only thereof fordisabling said control mechanism, a start key, and means responsive toactuation of said start key for re-enabling said control mechanism.

4. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentially controlling saidactuators, operating mechanism for said differential actuators includinga cyclicly operable clutch; depressible control bars, control mechanismcontrolled by said bars upon depression of any thereof for causingengagement of said clutch; means controlled by said operating mechanismin response to depression of one of said bars for disabling said controlmechanism during an operating cycle, a depressible start key, means forlatching said start key depressed, and means responsive to depression ofsaid one of said bars for releasing said start key from said latchingmeans.

5. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentially controlling saidactuators, operating mechanism for said actuators including a cycliclyoperable clutch; a plurality of depressible controls bars, controlmechanism controlled by said bars upon depression of any thereof forcausing operation of said clutch, means responsive to depression of oneof said bars for operating and then disabling said control mechanism, alatching device normally latching said control mechanism in disabled condition, a depressible start key, means responsive to depression of saidstart key for releasing said control mechanism from said latching deviceand for enabling said control mechanism, means for retaining said startkey depressed, and means responsive to depression of said one of saidbars for releasing said start key from said retaining means.

6. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentiaily controlling saidactuators, operating mechanism for said differential actuators includinga cyclicly operable clutch; a plurality of depressible control bars,control mechanism including a coupling controlled by said bars upondepression of any thereof for causing engagement of said clutch; meansresponsive to depression of one of said bars for causing engagement ofsaid clutch and for thereafter disabling said coupling, a start key, andmeans responsive to actuation of said start key for enabling saidcoupling.

7. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentially controlling saidactuators, operating mechanism for said actuators including a cycliclyoperable clutch; depressible control bars, control mechanism controlledby said bars upon depression of any thereof for causing engagement ofsaid clutch; a symbol recording device differentially controlled by saidbars upon depression thereof, means controlled by said symbol device ina certain condition only thereof for disabling said control mechanism, astart key, and means responsive to actuation of said start key forenabling said control mechanism.

8. In a calculating machine, an accumulator, differential actuatorstherefor, selection mechanism for differentially controlling saidactuators, operating mechanism for said actuators including a cycliclyoperable clutch; depressible control bars, control mechanism including adisengageable coupling operable by said bars upon de pression of anythereof for causing engagement of said clutch; a symbol printing deviceincluding a control rack differentially movable to different positionsunder control of different depressed ones of said bars, respectively;means controlled by said rack when moved to one of said positions fordisengaging said coupling, a start key, and means responsive toactuation of said start key for engaging said coupling.

9. In a calculating machine having an accumulator, differentialactuators therefor, selection mechanism for differential controllingsaid actuators, operating mechanism for said actuators including acyclicly operable 13 clutch; depressible control bars, control mechanismincluding a disengageable coupling controlled by said bars upondepression of any thereof for causing engagement of said clutch; asymbol printing device including a symbol control rack differentiallymovable to difierent positions under control of different depressed onesof said bars, respectively, means responsive to movement of said rack toone of said positions upon depression of a respective one of said barsfor disengaging said coupling,

a depressible start key, means responsive to depression 10 ReferencesCited in the file of this patent UNITED STATES PATENTS Crosman Jan. 16,1945 Gang May 17, 1949

